/*
 * Copyright 2001-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package code.buildit.plugin.processor.filter;

import com.intellij.psi.*;

import java.util.List;
import java.util.ArrayList;

public class FieldFilter {
    public boolean methodWithSameNameDoesNotExist(PsiClass clazz, PsiField field) {
        PsiMethod[] psiMethods = clazz.findMethodsByName(field.getName(), false);
        return psiMethods.length == 0;
    }

    private boolean fieldQualifiesForAddition(PsiClass clazz, PsiField field) {
        PsiModifierList list = field.getModifierList();
        return list != null && !list.hasModifierProperty(PsiModifier.STATIC) && methodWithSameNameDoesNotExist(clazz, field);
    }

    public List<PsiField> filter(PsiClass clazz, PsiField[] newFields) {
        List<PsiField> filteredList = new ArrayList<PsiField>();
        for (PsiField field : newFields) {
            if (fieldQualifiesForAddition(clazz, field)) {
                filteredList.add(field);
            }
        }
        return filteredList;
    }
}
